iMac running Windows - Bootcamp Black Screen not Booting

Hello. I have a late 2009 iMac running Windows 7 via Bootcamp. After running perfect for several years, I turned it on this morning and am receiving a black screen. Restart the iMac and then I might get a white screen - regardless it is not booting up in either the Mac side, nor the Windows side. Any and all suggestions are welcome.

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